Boob mechanism



May 30, 1933. Q NRTQN 1,911,643

` DOOR MECHANIsM Filed Jan. l0. 1929v 3 IZ @7" MW A 7. 7l fk 13 digg num mx mm \\1 INVENTOR Patented May 3Q, 1933 M ;ENTOFFIGE c CLIFFORD lNon'roNoE sOUTH ORANGE, NEW JERSEY, AssIeNoaBY MnsNE AssIGN- MENTS, 'ro o'rIs ELEvn'ron COMPANY, A CORPORATION OE NEW JERSEY noon MEcHiiNrsM l Application flied January 10,1929. seiia1;No.. 33i,454. lj

This invention relates to improvements in door loperating vmechanism and is particularly designed for use with elevator doors. y It is a primary ob]` ect of the invention to Qi provide av door moving mechanism which will operate with uniformity'to open and close elevator doors andwhich' will permit thedoor to belopened to a limited extent independently of such' door moving mechanism. Y

The above and other objects will appear more fullyfrom the following description when considered in'` connection with the drawing in which;`

Fig. 1; is an elevational'view of one form which the invention may assume.

Fig. 2 -is an enlargel'plan view of the apparatus shownf'inFig. 1. v f jl Fig. 3 is an elevational Vview thereof. l

Fig. 4 is an]elevational-viewL of one part of the apparatus, parts beinglin section, il-

lustratingv the limited,k opening ni`.ov ement ofthe door. g f

l Fig. 5 is a view similar to Fig. 14 showing 25 `condition of the levers when the door is opened in the normal manner. y

Fig. 6 is an enlarged detail View of a portion of thevconstr'uction shownin Fig. 4.

c Fig. 7-is a horizontal sectional -view onfan 30 enlargedscale of a portion of the mechanismshownin Fig. 2. i y In the controllo'f elevator doors it is necessary that: thedoor, moving mechanism be formed-.ofy parts lallowing no looseness be- 35 tweenthe same inthe normal movement of the door to open or closed position. At the same time it is desirable topermit a limited movement of thedoor from closedor near closed position sorasftopermit passengers '40 to extricate objectsl caught in! the door such for vexample asV portions of their clothing, umbrellas or the like.`r The construction described belowv accomplishes the purpose of maintaining the *door Vmoving mechanism unyielding in the normal operation thereof but also affordsa certain independent opening movement of the door from'v substantially-'closed position'. I I

Referring to the details of the drawing the-elevatordoors Sand 9 are shown'as of the two speedtype", Vthe door. 8 being movable one door widthfand thedoor 9` being movable two door' widths behind the third or stationary door (not shown).` v The doors are designed kto be moved by b5 the door moving toggle levers 10comprisingthe three links 11, 12,/and 13 which are attached respectivelyto` the two 'movable door sections 9 and`8 and tothe elevator shaft wall or other stationary member.. The toggle links 10 'may 'beoperated vby the manual member 14 or by means of the power devices indicated generally at 15, said power devicesbeing connected by the link 16 to the projection 17 on the toggle link 13. Other power devices mayobviously bejsubstituted for those shown. l Itwill be under- 1 stood that y downwardfpressure -upon the handle 12 or upward pressure through'the power device 14 will break the toggle levers and move them to thedotted Iline position shown in Fig. 1 for {"openingf both doors'.` The doors may be closed by manual pressure applied directly to the doors orthrough the toggle `levers although preferably spring pressure is'appliedA as by providing a Yusual door closing springwithin the cylinder `15. Such doors'and ldoor moving devices are previously known in this art. Y f With door'moving devices as heretofore constructed the doors have been positively heldin completely closed position capable of beingopened only by operation of the doorgmoving mechanism. According to the present invention one door section 9 may bemoved slightlyl independently of the :operation of the doory moving levers.

Independent movement of one of the door sections is accomplishedl according Vto the construction disclosed hereinby forming the link 114of two sections 11a and 11b. k'The section' 11a carries 'a collar 18 rigidly oon-` nected `tothe same and encircling thefs'ection=11b SO as tobeslidable with relation thereto. A similar collar 2O yis connected to the outer end ofthe section 11b and 'encircles the section 11a inslidable relationvto the latter. Thefcoll'ars 18 and 20 are normally drawn toward yone another intocontacting ,10o relation'fby' means ofthe spring 22 connected ing ends of the member 28'being received in and securely supported by vthe separated bars constituting the toggle lever 12. The

bearing 28 is formed with a diametric opening or recess 320i a size just suiicient to loosely receive the projecting end of the plunger 24. The transverse opening 532 is arranged to be directed toward the plunger 24 when the toggles are in straiglit-line position as shown in Fig. 1.

The above described constructioncauses the bearing 28 to be moved with the link'12 and the plunger 24 to be moved with the link 11 so that a very slight relative turning movement of the links lland 12 pre- Vents the entrance of the plunger 24 into the opening 32. If desired the slotted busliing 28 may be mounted on a friction clutch, preferably of the snap action self centering type to permit rotation thereof under cer- `tain conditions as, for example, when the door is opened after the plunger 24 has passed through the said bushing. The operation of the apparatus is as follows: ,l Y In normal operation when power is applied through the devices 15, or where the levers are hand-actuated'through the manual member 14, the straight-line arrangement of the toggle levers is broken and the doors arey moved toward open position. During such movement the tension upon the inner link section 115 yin conjunction with the spring 22 maintains the collars 18 and 20 in engagement wlierebythe linky 11 operates as one piece in the usual manner. After a slight relative yturning movement -of the links 11 and 12 the plunger 24 is prevented from passing into the aperture 32 under any condition so that the link portions 11a and 11?) necessarily operate as one member until the door is againclosed.

After the door has reached substantially closed position if for any reason it is desired to move the door k9 to slightly open position, for example to the extent of about four inches, such limited vmovement is permissible with the constructionsS shown so long as the links 11, 12 and 13 remain in door closed position. The movement of the door 9 independently of togglenlever move- ,ment merely causes the plunger 24 to pass into the recess in the bearing member 28. The opening movement of the door under these conditions is limited by the engagement of the collar 18 against a suitable stop lug or against the bushing 30 to allow the desired openingof the door'. The spring 22 draws the door 9 to closed position when the latter is released.

While the drawing discloses only the twospeed type of doors with three toggle links it will be understood that the invention is equally applicable to a single movable dooi` requiring only two toggle levers or in fact to any door mechanism employing a pivoted lever.

'By means of the construction described above it will be seen that under normal operation the doors may be uniformly moved vclosed position without disturbing the door moving mechanism.

Having now described my invention, I claim:

l. In combination with a movable elevator door, means for moving said door comprising a pivotedliiik having normally a definite length, means ermitting variation of said length when said link and door are in one position and ineansautomatically preventing such variation on movement of said link and door to different positions..

2. In combination with a movable elevator door, means for moving said door comprising al pivoted link 'having normally a definite length, means permitting variation of said length whensaid link and door are in the positions assumed thereby in door closed position and means automatically .prneventing such variation on movement of said link'and door to diiferent positions.

3'. In a door controllingv mechanism, toggle links pivotally connected to said door and operative to move said door upon the breaking of said toggle links, onerof said links including a yielding connection permitting movement of said door` relatively to the other of said links without the breaking of said toggle links and means for locking said connection against' yielding, said locking means operating automatically upon the breaking of said toggle links.

4. In a door controlling mechanism, door moving lmembers including a link formed with opposite pivot points, means on said link permitting said pivot pointsto approach one another, and means controlled simultaneously with door and link movement for automatically resisting the a-pproach of said pivot points toward one another.

5. In an elevator door controlling mechasol nism, toggle links, an apertured stud movable with one of said links, a projecting element movable with another of said links and alined with said aperture only when said links are in door closed position, means for accommodating limited independent movement of said door relatively to a portion of said last named link and simultaneously causing said projecting element to pass into the aperture in said stud.

6. In a door controlling mechanism, toggle links operatively connected to said door means for permitting limited movement of said door independently of movement of said links, said means being operative in one v direction only and automatically controlled means for positively preventing such independent movement of said door.

Signed at New York in the county of New York and State of New York this 9th day of January A. D. 1929.

v CLIFFORD NORTON. 

